required for normal network operation regardless of the state of the PHY-LLC interface. When the interface is
in the reset or disabled state and LPS is again observed active, the PHY initializes the interface and returns it
to normal operation.
When the PHY-LLC interface is in the low-power disabled state, the TSB41AB1 automatically enters a
low-power mode if the port is inactive (disconnected, disabled, or suspended). In this low-power mode, the
TSB41AB1 disables its internal clock generators and also disables various voltage and current reference
circuits depending on the state of the port (some reference circuitry must remain active in order to detect new
cable connections, disconnections, or incoming TPBIAS, for example). The lowest power consumption (the
ultralow-power sleep mode) is attained when the port is either disconnected, or disabled with the port interrupt
enable bit cleared. The TSB41AB1 exits the low-power mode when the LPS input is asserted high or when a
port event occurs which requires that the TSB41AB1 become active in order to respond to the event or to notify
the LLC of the event (for example, incoming bias is detected on a suspended port, a disconnection is detected
on a suspended port, a new connection is detected on a nondisabled port, etc.). The SYSCLK output becomes
active (and the PHY-LLC interface is initialized and becomes operative) within 7.3 ms after LPS is asserted high
when the TSB41AB1 is in the low-power mode.
The PHY uses the C/LKON terminal to notify the LLC to power up and become active. When activated, the
C/LKON signal is a square wave of approximately 163-ns period. The PHY activates the C/LKON output when
the LLC is inactive and a wake-up event occurs. The LLC is considered inactive when either the LPS input is
inactive, as described above, or the LCtrl bit is cleared to 0. A wake-up event occurs when a link-on PHY packet
addressed to this node is received, or when a PHY interrupt occurs. The PHY deasserts the C/LKON output
when the LLC becomes active (both LPS active and the LCtrl bit set to 1). The PHY also deasserts the C/LKON
output when a bus reset occurs unless a PHY interrupt condition exists which would otherwise cause C/LKON
to be active.
XTAL275OExternal clock reference output. Not connected if XTAL1 is driven by an external single-ended oscillator.
Digital Video
C[9:0]/
GPIO[9:0]
D_BLUE58IDigital BLUE input from overlay device
D_GREEN59IDigital GREEN input from overlay device
D_RED60IDigital RED input from overlay device
FSO57IFast-switch overlay between digital RGB and any video
Y[9:0]
Miscellaneous Signals
FSS/GPIO35I/O
GLCO/I2CA37I/O
INTREQ30OInterrupt request
PWDN33I
RESETB34IReset input, active low
80
1
2
7
8
9
16
17
18
23
57, 58,
59, 60,
63, 64,
65, 66,
69, 70
43, 44,
45, 46,
47, 50,
51, 52,
53, 54
I/O
VI_1_x: Analog video input for CVBS/Pb/B/C
VI_2_x: Analog video input for CVBS/Y/G
VI_3_x: Analog video input for CVBS/Pr/R/C
VI_4_A: Analog video input for CVBS/Y
I
Up to 10 composite, 4 S-video, and 2 composite or 3 component video inputs (or a combination thereof)
can be supported.
The inputs must be ac-coupled. The recommended coupling capacitor is 0.1 µF.
The possible input configurations are listed in the input select register at I2C subaddress 00h (see
Section 2.11.1).
External clock reference input. It may be connected to an external oscillator with a 1.8-V compatible clock
signal or a 14.31818-MHz crystal oscillator.
Digital video output of CbCr, C[9] is MSB and C[0] is LSB. Unused outputs can be left unconnected. Also,
these terminals can be programmable general-purpose I/O.
O
For the 8-bit mode, the two LSBs are ignored.
Digital video output of Y/YCbCr, Y[9] is MSB and Y[0] is LSB.
O
For the 8-bit mode, the two LSBs are ignored. Unused outputs can be left unconnected.
Fast-switch (blanking) input. Switching signal between the synchronous component video (YPbPr/RGB)
and the composite video input.
Programmable general-purpose I/O
Genlock control output (GLCO). Two Genlock data formats are available: TI format and real time control
(RTC) format.
During reset, this terminal is an input used to program the I2C address LSB.
Power down input:
1 = Power down
0 = Normal mode
DESCRIPTION
1–6
11
Page 14
Table 1–1. Terminal Functions (Continued)
TVP5146
TERMINAL
NAMENUMBER
Host Interface
SCL28II2C clock input
SDA29I/OI2C data bus
Power Supplies
AGND26IAnalog ground. Connect to analog ground.
A18GND_REF13IAnalog 1.8-V return
A18VDD_REF12IAnalog power for reference 1.8 V
CH1_A18GND
CH2_A18GND
CH3_A18GND
CH4_A18GND
CH1_A18VDD
CH2_A18VDD
CH3_A18VDD
CH4_A18VDD
CH1_A33GND
CH2_A33GND
CH3_A33GND
CH4_A33GND
CH1_A33VDD
CH2_A33VDD
CH3_A33VDD
CH4_A33VDD
DGND
DVDD
IOGND39, 49, 62IDigital power return
IOVDD38, 48, 61IDigital power. Connect to 3.3 V or less for reduced noise.
PLL_A18GND77IAnalog power return
PLL_A18VDD76IAnalog power. Connect to 1.8 V.
Sync Signals
HS/CS/GPIO72I/O
VS/VBLK/GPIO73I/O
FID/GPIO71I/O
AVID/GPIO36I/O
79
10
15
24
78
11
14
25
3
6
19
22
4
5
20
21
27, 32, 42,
56, 68
31, 41, 55,
67
I/O
IAnalog 1.8-V return
IAnalog power. Connect to 1.8 V.
IAnalog 3.3-V return
IAnalog power. Connect to 3.3 V.
IDigital return
IDigital power. Connect to 1.8 V.
Horizontal sync output or digital composite sync output
Programmable general-purpose I/O
Vertical sync output (for modes with dedicated VSYNC) or VBLK output
Programmable general-purpose I/O
Odd/even field indicator output. This terminal needs a pulldown resistor.
Programmable general-purpose I/O
Active video indicator output
Programmable general-purpose I/O
This IC is a 5-input 2-output AV switch with I2C control, developed for use in televisions. Two outputs enable
it to support two screens or "picture-in-picture".
Features
1. Serial control by I2C bus.
2. 5-inputs, 2-outputs.
3. Video and audio system switches can be controlled independently.
4. 6dB amplifier built in to video system.
5. Built-in Y/C MIX circuit.
6. Slave address can be changed : 90H or 92H.
7. Audio muting possible by external pin.
8. Maintains high impedance even when I
9. Built-in 3 value discrimination function.
10.On-chip power ON reset function.
11.Two types of audio input impedance : 60kΩ and 30kΩ.
MM1313AD : 60kΩMM1313BD : 30kΩ
12.Supports 2-screen or P-IN-P TV.
2
C BUS line (SDA, SCL) power supply is off.
Package
SDIP-42A (MM1313AD, MM1313BD)
Applications
1. Televisions
2. Other video equipment
19
Page 22
MITSUMI
Equivalent Block Diagram
2
C BUS Control 5-Input 2-Output AV Switch MM1313
I
20
Page 23
MITSUMI
Pin Function
2
C BUS Control 5-Input 2-Output AV Switch MM1313
I
Pin No.
Name
41MTV-V
1V1
7V2
13V3
27STV
3V1
9V2
31Y
5V1-C
11V2
29C
42MTV-L
2V1
8V2
14V3
25STV
40MTV
4V1
10V2
16V3
26STV
-
-
-
-
-
IN1
-
IN1
-
-
-
-
-
-
Internal equivalent circuit diagram
Pin No.
Name
Internal equivalent circuit diagram
33LOUT1
V
V
V
-
V
22L
32R
24R
OUT2
OUT1
OUT2
Y
Y
36BIAS
C
19SCL
L
L
L
-
L
-
R
R
R
R
-
R
34VOUT1
23V
OUT2
37YOUT1
39C
OUT1
20SDA
6S1
12S2
21ADR
28Mute
21
Page 24
MITSUMI
2
C BUS Control 5-Input 2-Output AV Switch MM1313
I
Absolute Maximum Ratings
ItemSymbolRatingsUnits
Storage temperatureT
Operating temperatureT
Power supply voltageV
Allowable power dissipationPd850mW
Electrical Characteristics
ItemSymbol
Operating power supply voltage
Current consumptionI
V
OUT1 output
Voltage gainG
Frequency characteristicsF
Differential gainDG
Differential phaseDP
Input dynamic rangeD
V
OUT2 output
Voltage gainG
Frequency characteristicsF
Differential gainDG
Differential phaseDP
Input dynamic rangeD
YOUT1 output
Voltage gain
Frequency characteristics
Differential gainDGYTP2
Differential phaseDPYTP2
(Ta=25°C, VCC=9V)
VCC8910V
CC38VCC=9V, no signal, no load4052mA
V1TP1Sine wave 1.0VP-P, 100kHz5.56.06.5dB
V1TP1
V1TP1
V1TP1
V1SG1~3Maximum input for total higher1.61.9VP-P
V2TP6Sine wave 1.0VP-P, 100kHz5.56.06.5dB
V2TP6
V2TP6
V2TP6
V2SG1~3Maximum input for total higher1.61.9VP-P
G
Y1TP2
G
Y2TP2
Y1TP2
F
F
Y2TP2
(Ta=25°C)
Measure
ment pin
STG
OPR
CC12V
-
40~+125
-
20~+75
Conditions (unless otherwise indicated,
Measurement Circuit Figure 1)
Sine wave 1.0V
Vn-V : Staircase 1V
P-P
, 10MHz/100kHz-1.001.0dB
P-P
°
C
°
C
Min. Typ. Max. Units
APL=10~90%
Vn-Y : Staircase (luminance signal) 1V
Vn-C : Chroma signal 0.3V
P-P
P-P
-
30 3 %
APL=10~90%
Vn-V : Staircase 1V
P-P
APL=10~90%
Vn-Y : Staircase (luminance signal) 1V
Vn-C : Chroma signal 0.3V
P-P
P-P
-
303deg
APL=10~90%
Sine wave 100kHz
harmonic distortion factor < 1.0%
Sine wave 1.0V
10MHz/100kHz
Vn-V : Staircase 1V
P-P
P-P
-
1.001.0dB
APL=10~90%
Vn-Y : Staircase (luminance signal) 1V
Vn-C : Chroma signal 0.3V
P-P
P-P
-
30 3 %
APL=10~90%
Vn-V : Staircase 1V
P-P
APL=10~90%
Vn-Y : Staircase (luminance signal) 1V
Vn-C : Chroma signal 0.3V
P-P
P-P
-
303deg
APL=10~90%
Sine wave 100kHz
harmonic distortion factor < 1.0%
Vn-Y : Sine wave 1.0V
YIN1 : Sine wave 2.0V
-
Y : Sine wave 1.0VP
Vn
10MHz/100kHz
Y
IN1 : Staircase 2.0VP-P
10MHz/100kHz
Vn-Y : Staircase 1V
APL=10~90%
Y
IN1: Staircase 2VP-P
P-P
, 100kHz
P-P
, 100kHz-0.500.5
-
P
P-P
5.56.06.5
-
1.001.0
-
1.001.0
-
30 3 %
APL=10~90%
Vn-Y : Staircase 1V
APL=10~90%
IN1 : Staircase 2VP-P
Y
P-P
-
303deg
APL=10~90%
dB
dB
22
Page 25
MITSUMI
2
C BUS Control 5-Input 2-Output AV Switch MM1313
I
ItemSymbol
D
Measure
ment pin
Y1SG2Maximum input for total higher1.61.9
Input dynamic range
DY2SG4Maximum input for total higher3.23.8
Output impedanceZ
C
OUT1 output
Voltage gain
OYC150Ω
C1TP3
G
G
C2TP3
F
C1TP3
Frequency characteristics
C2TP3
F
Differential gainDG
Differential phaseDP
CTP3
CTP3
D
C1SG3Maximum input for total higher2.753.25
Input dynamic range
C2SG5Maximum input for total higher5.56.5
D
Input impedance Z
Output impedanceZ
OUT1 output
L
Voltage gain
Frequency characteristicsF
Total higher harmonic distortion
Input dynamic rangeD
ICVn
OC150Ω
G
L11TP4b7=0, Sine wave 2.5VP-P, 1kHz
G
L12TP4b7=1, Sine wave 2.5VP-P, 1kHz
L1TP4Sine wave 2.5VP-P, 1MHz/1kHz
1TP4Sine wave 2.5VP
THDL
L1SG6Maximum input for total higher2.62.8Vrms
Output offset voltage VOFFL133
Input impedanceZ
Output impedanceZ
L
OUT2 output
Voltage gainG
Frequency characteristicsF
Total higher harmonic distortion
Input dynamic rangeD
IL1426078kΩ
OL1120Ω
L2TP7Sine wave 2.5VP-P, 1kHz
L2TP7Sine wave 2.5VP-P, 1MHz/1kHz
THDL2TP7Sine wave 2.5VP
L2SG6Maximum input for total higher2.62.8Vrms
Output offset voltageVOFFL222
Output impedanceZ
R
OUT1 output
Voltage gain
Frequency characteristicsF
Total higher harmonic distortion
Input dynamic rangeD
OL2120Ω
R11TP5b7=0, Sine wave 2.5VP-P, 1kHz
G
G
R12TP5b7=1, Sine wave 2.5VP-P, 1kHz
R1TP5Sine wave 2.5VP-P, 1MHz/1kHz
R1TP5Sine wave 2.5VP-P, 1kHz0.030.1%
THD
R1SG7Maximum input for total higher2.62.8Vrms
Output offset voltageVOFFR132
Input impedance Z
Output impedanceZ
IR1426078kΩ
OR1120Ω
Conditions (unless otherwise indicated,
Measurement Circuit Figure 1)
Min. Typ. Max. Units
Vn-Y : Sine wave 100kHz
harmonic distortion factor < 1.0%
V
IN1 : Sine wave 100kHz
harmonic distortion factor < 1.0%
Vn-C : Sine wave 1.0V
CIN1 : Sine wave 2.0V
-
C : Sine wave 1.0VP
Vn
10MHz/100kHz
C
IN1 : Sine wave 2.0VP-P
10MHz/100kHz
IN1 : Staircase 2VP-P
C
APL=10~90%
C
IN1 : Staircase 2VP-P
APL=10~90%
P-P
, 100kHz
P-P
, 100kHz-0.500.5
-
P
5.56.06.5
-
1.001.0
-
1.001.0
-
30 3 %
-
303deg
Vn-C : Sine wave 100kHz
harmonic distortion factor < 1.0%
CIN1: Sine wave 100kHz
harmonic distortion factor < 1.0%
-
C, CIN1101520kΩ
-
6.5-6.0-5.5
-
0.50.00.5
-
3.001.0dB
-
P, 1kHz0.030.1%
Sine wave 1kHz
harmonic distortion factor < 0.5%
L
OUT1 pin DC difference during
SW switching
-
0.50.00.5dB
-
3.001.0dB
-
P, 1kHz0.030.1%
Sine wave 1kHz
harmonic distortion factor < 0.5%
OUT2 pin DC difference during
L
SW switching
-
6.5-6.0-5.5
-
0.50.00.5
-
3.001.0dB
Sine wave 1kHz
harmonic distortion factor < 0.5%
R
OUT1 pin DC difference during
SW switching
P-P
V
dB
dB
V
P-P
dB
0±15mV
0±15mV
dB
0±15mV
23
Page 26
MITSUMI
SDA
SCL
t
BUF
PPS
tHD:STAtHD:DATtHIGHtSU:DAT tSU:STAtSU:STD
tLOW
Sr
t
RtF
2
C BUS Control 5-Input 2-Output AV Switch MM1313
I
ItemSymbol
Measure
ment pin
ROUT2 output
Voltage gainG
Frequency characteristicsF
Total higher harmonic distortion
Input dynamic rangeD
R2TP8Sine wave 2.5VP-P, 1kHz
R2TP8Sine wave 2.5VP-P, 1MHz/1kHz
THDR2TP8Sine wave 2.5VP
R2SG7Maximum input for total higher2.62.8Vrms
Output offset voltageVOFFR224
Output impedanceZ
OR2120Ω
Crosswalk
V
OUT 1CTV1TP1
OUT 2CTV2TP2
V
Y
OUT 1CTY1TP3
OUT 1CTC1TP6
C
L
OUT 1CTL1TP4
OUT 2CTL2TP5Measurement Circuit Figure 2
Measurement Circuit Figure 2
for SG1 input : 4.43MHz, 1V
for SG2 input : 4.43MHz, 0.5V
VOUT1 pin, VOUT2 pin
No signal, no load
YOUT1 pin, COUT1 pin
No signal, no load
2
C logic low level discrimination value0.01.5V
2
I
Clogic high level discrimination value3.05.0V
P-P
P-P
4.14.44.7V
3.33.63.9V
-
-
0±15mV
-
60-53dB
-
60-53dB
-
60-53dB
-
60-53dB
-
90-80dB
-
90-80dB
-
90-80dB
-
90-80dB
10+10µA
10+10µA
I2C BUS BUS Control Signal
24
Page 27
MITSUMI
Measurement Circuit
Measurement Circuit 1
2
C BUS Control 5-Input 2-Output AV Switch MM1313
I
25
Page 28
MITSUMI
Measurement Circuit 2 (Crosstalk measurement)
2
C BUS Control 5-Input 2-Output AV Switch MM1313
I
26
Page 29
2
SDA
SCL
S
123456 78A1238A P
S:Start Condition
P:Stop Condition
A:Acknowledge
C BUS Control 5-Input 2-Output AV Switch MM1313
MITSUMI
I
I2C BUS
The I2C BUS is a BUS system developed by Philips for internal use in equipment. Data transmission is carried
out by the two SDA and SCL lines, in byte units, with the MSB first from start condition.
[Control Register]
The control register contains data sent from the master in order to determine the status of each switch.
S
Slave address
1001000/10
R/W
A
Control register 1
b7 b6 b5 b4 b3 b2 b1 b0
A
Control register 2
b7 b6 b5 b4 b3 b2 b1 b0
AP
Address byteControl data
The data format is set as shown in the figure above. The first 7 bits in the address byte are allocated to the
slave address, and the remaining 1 bit is allocated to the read/write bit. The read/write bit is set at 0 when
using as a control register.
The MM1313 slave address can be selected as 90H/92H depending on the status of the ADR pin. When ADR
pin is low it is 90H.
The relationship between the control register bits and switch control is as shown below.
b7b6b5b4b3b2b1b0
Audio
S/Comp
Video-SelectAudio-Select
GainSelect
The control register bits are reset to 0 when power is applied.
MM1313 control is carried out by the 3-byte structure of the 1 address byte and 2 control data bytes. The first
byte in the control data is control data for output 1, and the remaining 1 byte is control data for output 2.
All of the remaining data (fourth byte and after) are ignored.
Refer to the separate tables for details on switch control.
27
Page 30
2
Reset released
Reset status
Undefined
0.6V4.3V5.4VV
CC
C BUS Control 5-Input 2-Output AV Switch MM1313
MITSUMI
I
[Status Register]
The status register contains data for sending device status to the master.
S
A
Slave addressR/W
Status register
NAP
1001000/11 b7b6b5b4b3b2b1b0
Address byteStatus data
The data format is set as shown in the figure above. The first 7 bits in the address byte are allocated to the
slave address, and the remaining 1 bit is allocated to the read/write bit. The read/write bit is set at 1 when
using as a status register.
The MM1313 slave address can be selected as 91H/93H depending on the status of the ADR pin. When the
ADR pin is low it is 91H. However, the confirmation response after completion of the status register should be
non-acknowledge.
The status register output data as shown below.
b7b6b5b4b3b2b1b0
P-ONS1S1S2S2
RESET
OPENSELOPENSEL
P-ON RESET : Returns 1 for power on reset. However once data read begins, 0 is returned next.
S1/S2 OPEN : Returns 0 when the S1/S2 pin is not open, and returns 1 when the S1/S2 pin is open
S1/S2 SEL : Returns 0 when the S1/S2 pin is not grounded, and returns 1 when the S1/S2 pin is grounded.
S1/S2 OPEN, SEL have 3-value discrimination, and the combinations are as shown below.
S1/S2 pin DC voltageS1/S2 OPENS1/S2 SEL
0.8V or less01
1.3V or more, 3.5V or less
00
4.5V or more10
[Power On Reset]
Power on reset is built in to reset each control register to 0 when power is turned on.
Power on reset threshold has hysteresis as shown in the figure below. The IC power on reset status can be
discriminated by reading the status register P-ON RESET.
28
Page 31
MITSUMI
Switch Control Table
2
C BUS Control 5-Input 2-Output AV Switch MM1313
I
1. Video Output 1
b6b5b4b3VOUT1YOUT1COUT1
0000 MuteMuteMute
0001MTV
0010 V1
0011 V2
0100 V3
0101 STV
10
01
11
1000 MuteMuteMute
1001MTV
1010V1
1011V2
1100 V3
1101 STV
10
11
11
-
VYIN1CIN1
-
VYIN1CIN1
-
VYIN1CIN1
-
VYIN1CIN1
-
VYIN1CIN1
MuteMuteMute
-
VYIN1CIN1
-
Y+CV1-YV1
-
Y+CV2-YV2
-
VYIN1CIN1
-
VYIN1CIN1
MuteMuteMute
2. Video Output 2
b6b5b4b3VOUT2
0000 Mute
0001MTV
0010 V1
0011 V2
0100 V3
0101 STV
01
1000 Mute
1001MTV
-
C
-
C
1010V1
1011V2
1100 V3
1101 STV
11
10
11
10
11
-
-
-
Mute
-
Y+C
-
Y+C
-
Mute
-
V
V
V
V
-
V
-
V
V
-
V
3. Audio Output 1
Mute pinb2b1b0LOUT1ROUT1
000MuteMute
001MTV
010 V1
1.5V or less011 V2
(OPEN)100 V3
101 STV
10
1
11
3.0V or more
---
-
LMTV-R
-
LV1
-
LV2
-
LV3
-
LSTV-R
MuteMute
MuteMute
5. Audio Output 2
Mute pinb2b1b0LOUT2ROUT2
000MuteMute
001MTV
010 V1
1.5V or less011 V2
-
LMTV-R
-
LV1
-
LV2
4. Audio Output 1 Gain
Switching
b7Output gain
0
-
R
-
R
-
R
-
R
-
R
10dB output
-
6dB output
(OPEN)100 V3
101 STV
10
3.0V or more
1
11
---
MuteMute
MuteMute
-
LV3
-
LSTV-R
29
-
R
Page 32
MITSUMI
Application Circuit
2
C BUS Control 5-Input 2-Output AV Switch MM1313
I
Notes
OUT is set at 4.4V and CIN at 4.9V
1. V
Please note that capacitance polarity may vary depending on comb filter bias.
2. Each audio output can be muted by making pin 19 high. Mute is off when it is open or low.
30
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19-0463; Rev 0; 1/96
Low-Voltage, CMOS Analog
Multiplexers/Switches
_______________General Description
The MAX4051/MAX4052/MAX4053 and MAX4051A/
MAX4052A/MAX4053A are low-voltage, CMOS analog
ICs configured as an 8-channel multiplexer (MAX4051/A),
two 4-channel multiplexers (MAX4052/A), and three single-pole/double-throw (SPDT) switches (MAX4053/A).
The A-suffix parts are fully characterized for on-resistance
match, on-resistance flatness, and low leakage.
These CMOS devices can operate continuously with
dual power supplies ranging from ±2.7V to ±8V or a
single supply between +2.7V and +16V. Each switch
can handle rail-to-rail analog signals. The off leakage
current is only 0.1nA at +25°C or 5nA at +85°C
(MAX4051A/MAX4052A/4053A).
All digital inputs have 0.8V to 2.4V logic thresholds,
ensuring TTL/CMOS-logic compatibility when using
±5V or a single +5V supply.
________________________Applications
Battery-Operated Equipment
Audio and Video Signal Routing
Low-Voltage Data-Acquisition Systems
Communications Circuits
____________________________Features
♦ Pin Compatible with Industry-Standard
74HC4051/74HC4052/74HC4053
♦ Guaranteed On-Resistance:
100Ω with ±5V Supplies
♦ Guaranteed Match Between Channels:
6Ω (MAX4051A–MAX4053A)
12Ω (MAX4051–MAX4053)
♦ Guaranteed Low Off Leakage Currents:
0.1nA at +25°C (MAX4051A–MAX4053A)
1nA at +25°C (MAX4051–MAX4053)
♦ Guaranteed Low On Leakage Currents:
0.1nA at +25°C (MAX4051A–MAX4053A)
1nA at +25°C (MAX4051–MAX4053)
V+ ........................................................................-0.3V to +17V
V-..........................................................................+0.3V to -17V
V+ to V-................................................................-0.3V to +17V
Voltage into Any Terminal (Note 1)..........(V- - 2V) to (V+ + 2V)
Continuous Current into Any Terminal..............................±30mA
Peak Current, NO or COM
(pulsed at 1ms, 10% duty cycle).................................±100mA
Note 1: Signals on any terminal exceeding V+ or V- are clamped by internal diodes. Limit forward-diode current to maximum
current rating.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
, unless otherwise noted. Typical values are at TA= +25°C.)
MAX
CONDITIONS
= -4.5V
= 4.5V
= VNO= ±4.5V
MAX4051A
MAX4051
MAX4052A,
MAX4053A
MAX4052,
MAX4053
MAX4051A
MAX4051
MAX4052A,
MAX4053A
MAX4052,
MAX4053
MAX4051A
MAX4051
MAX4052A,
MAX4053A
MAX4052,
MAX4053
TA= +25°C -0.1 0.0020.1
C, E
M-100100
TA= +25°C
C, E-1010
M
TA= +25°C
C, E
M
TA= +25°C
C, E-55
M
TA= +25°C -0.1 0.0020.1
C, E
M-100100
TA= +25°C
C, E-1010
M
TA= +25°C -0.1 0.0020.1
C, E
M
TA= +25°C
C, E
M
TA= +25°C -0.1 0.0020.1
C, E
M-100100
TA= +25°C
C, E-1010
M
TA= +25°C -0.1 0.0020.1
C, E
M
TA= +25°C
C, E
M
Turn-Off Time (Note 6)Figure 3
Transition TimeFigure 2
Break-Before-Make DelayFigure 4
NO Off CapacitanceVNO= GND, f = 1MHz, Figure 7
COM Off Capacitance
Switch On Capacitance
Off Isolation
Channel-to-Channel
Crosstalk
POWER SUPPLY
IH
IL
IL
t
ON
t
OFF
TRANS
OPEN
NO(OFF)
COM(OFF)
(ON)
ISO
CT
MAX4051/A, MAX4052/A, MAX4053/A
I+V+ Supply CurrentINH = ADD = 0V or V+
I-V- Supply CurrentINH = ADD = 0V or V+
Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 3: ∆R
Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
Note 5: Leakage parameters are 100% tested at maximum-rated hot operating temperature, and guaranteed by correlation at
Note 6: Guaranteed by design, not production tested.
= R
ON
specified analog signal ranges; i.e., V
= +25°C.
T
A
ON(MAX)
- R
ON(MIN)
.
to T
MIN
V
, V
ADD
CL= 1nF, RS= 0Ω, VNO= 0V,
Figure 5
V
= GND, f = 1MHz, Figure 7
COM
V
= V
COM
Figure 7
CL= 15pF, RL= 50Ω, f = 100kHz,
VNO= 1V
CL= 15pF, RL= 50Ω, f = 100kHz,
VNO= 1V
= 3V to 0V and 0V to -3V.
NO
, unless otherwise noted. Typical values are at TA= +25°C.)
MAX
CONDITIONS
= V+, 0V
INH
= GND, f = 1MHz,
NO
, Figure 6
RMS
, Figure 6
RMS
MINTYPMAX
(Note 2)
C, E, MV2.4V
C, E, MV0.8V
C, E, MµA-10.031IIH, I
TA= +25°C
C, E, M
TA= +25°C
C, E, M
TA= +25°C
TA= +25°C
TA= +25°C
TA= +25°CpF2C
TA= +25°CpF2C
TA= +25°CpF8C
TA= +25°CdB<-90V
TA= +25°CdB<-90V
C, E, MV±2.7±8V+, V-Power-Supply Range
TA= +25°C
C, E, M
TA= +25°C-10.11
C, E, M
50175
40150
210t
-10.11
-10
225
200
10
UNITS
ns
ns
ns75250t
ns
pC210QCharge Injection (Note 6)
µA
µA
34
Page 37
Low-Voltage, CMOS Analog
Multiplexers/Switches
ELECTRICAL CHARACTERISTICS—Single +5V Supply
(V+ = +4.5V to +5.5V, V- = 0V, TA= T
SYMBOLPARAMETER
ANALOG SWITCH
Analog Signal Range
COM–NO On-Resistance
NO Off Leakage Current
(Note 5)
COM Off Leakage
Current (Note 5)
COM On Leakage
Current (Note 5)
DIGITAL I/O
ADD, INH Input Logic
Threshold High
ADD, INH Input Logic
Threshold Low
ADD, INH Input Current
Logic High or Low
POWER SUPPLY
COM
I
NO(OFF)
I
COM(OFF)
I
COM(ON)
, V
R
ON
V
IH
V
IL
IH, IIL
to T
MIN
NO
, unless otherwise noted. Typical values are at TA= +25°C.)
MAX
V+ = 5V, INO= 1mA,
V
= 3.5V
COM
V+ = 5.5V, VNO= 4.5V,
V
= 0V
COM
V+ = 5.5V, VNO= 0V,
V
= 4.5V
COM
V+ = 5.5V, VNO= 4.5V,
V
= 0V
COM
V+ = 5.5V, VNO= 0V,
V
= 4.5V or 0V
COM
V+ = 5.5V,
V
= VNO= 4.5V
COM
ADD, VINH
INH = ADD = 0V or V+µAI+V+ Supply Current
CONDITIONS
MAX4051/A
MAX4052/A,
MAX4053/A
MAX4051/A
MAX4052/A,
MAX4053/A
MAX4051/A
MAX4052/A,
MAX4053/A
= V+, 0VµAI
MINTYPMAX
(Note 2)
C, E, M
TA= +25°C
C, E, M
TA= +25°C-10.0021
C, E
M
TA= +25°C
C, E
M
TA= +25°C-10.0021
C, E
M-100100
TA= +25°C
C, E-55
M
TA= +25°C-10.0021
C, E
M-100100
TA= +25°C
C, E-55
M
TA= +25°C
C, E-1010
M
TA= +25°C-10.0021
C, E
M
Turn-Off Time (Note 6)
Break-Before-Make DelayFigure 4
Off Isolation
Channel-to-Channel
Crosstalk
Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 3: ∆R
Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
Note 5: Leakage parameters are 100% tested at maximum-rated hot operating temperature, and guaranteed by correlation at
Note 6: Guaranteed by design, not production tested.
= R
ON
specified analog signal ranges; i.e., V
= +25°C.
T
A
ON(MAX)
- R
ON(MIN)
t
ON
t
OFF
OPEN
ISO
CT
to T
MIN
.
, unless otherwise noted. Typical values are at TA= +25°C.)
MAX
Figure 3
CL= 1nF, RS= 0Ω, VNO= 0V,
Figure 5
CL= 15pF, RL= 50Ω, f = 100kHz,
VNO= 1V
CL= 15pF, RL= 50Ω, f = 100kHz,
VNO= 1V
NO
, Figure 6
RMS
, Figure 6
RMS
= 3V to 0V and 0V to -3V.
CONDITIONS
TA= +25°C
C, E, M
TA= +25°C
C, E, M
TA= +25°C
TA= +25°C
TA= +25°CdB<-90V
TA= +25°CdB<-90V
MINTYPMAX
(Note 2)
90200
275
60125
175
UNITS
ns
ns
ns30t
pC210QCharge Injection (Note 6)
MAX4051/A, MAX4052/A, MAX4053/A
36
Page 39
Low-Voltage, CMOS Analog
Multiplexers/Switches
ELECTRICAL CHARACTERISTICS—Single +3V Supply
(V+ = +3.0V to +3.6V, V- = 0V, TA= T
SYMBOLPARAMETER
ANALOG SWITCH
Analog Signal Range
COM–NO On-Resistance
NO Off Leakage Current
(Note 5)
COM Off Leakage
Current (Note 5)
COM On Leakage
Current (Note 5)
DIGITAL I/O
ADD, INH Input Logic
Threshold High
ADD, INH Input Logic
Threshold Low
ADD, INH Input Current
Logic High or Low
POWER SUPPLY
COM
I
NO(OFF)
I
COM(OFF)
I
COM(ON)
to T
MIN
, V
NO
R
ON
V
IH
V
IL
IH, IIL
I+INH = ADD = 0V or V+V+ Supply CurrentµA
, unless otherwise noted. Typical values are at TA= +25°C.)
MAX
CONDITIONS
INO= 1mA, V+ = 3V,
V
= 1.5V
COM
V+ = 3.6V, VNO= 3V,
V
= 0V
COM
V+ = 3.6V, VNO= 0V,
V
= 3V
COM
MAX4051/A
V+ = 3.6V, VNO= 3V,
V
= 0V
COM
V+ = 3.6V, VNO= 0V,
V
= 3V
COM
V+ = 3.6V,
V
= VNO= 3V
COM
V
ADD, VINH
= V+, 0V
MAX4052/A,
MAX4053/A
MAX4051/A
MAX4052/A,
MAX4053/A
MAX4051/A
MAX4052/A,
MAX4053/A
MINTYPMAX
(Note 2)
C, E, M
TA= +25°C
C, E, M
TA= +25°C
C, E
M
TA= +25°C
C, E
M
TA= +25°C-10.0021
C, E
M-100100
TA= +25°C
C, E-55
M
TA= +25°C-10.0021
C, E
M-100100
TA= +25°C
C, E-55
M
TA= +25°C
C, E-1010
M
TA= +25°C
C, E
M
Turn-Off Time (Note 6)
Break-Before-Make DelayFigure 4
Off Isolation
Channel-to-Channel
Crosstalk
Note 2: The algebraic convention is used in this data sheet; the most negative value is shown in the minimum column.
Note 3: ∆R
Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the
Note 5: Leakage parameters are 100% tested at maximum-rated hot operating temperature, and guaranteed by correlation at
Note 6: Guaranteed by design, not production tested.
= R
ON
specified analog signal ranges; i.e., V
= +25°C.
T
A
ON(MAX)
- R
ON(MIN)
t
ON
t
OFF
OPEN
ISO
CT
to T
MIN
.
, unless otherwise noted. Typical values are at TA= +25°C.)
Analog Switch “B” Inputs 0–31, 2, 5, 4—
Analog Switch “B” Common3—
Analog Switch “B” Normally Open Input——
Analog Switch “B” Normally Closed Input——
Analog Switch “A” Normally Open Input——
Analog Switch “A” Normally Closed Input——
Digital Inhibit Input. Normally connect to GND. Can be driven
to logic high to set all switches off.
V-7
Negative Analog Supply Voltage Input. Connect to GND for
single-supply operation.
Ground. Connect to digital ground. (Analog signals have no
ground reference; they are limited to V+ and V-.)
Digital Address “A” Input99
Digital Address “B” Input1010
Digital Address “C” Input—11
Analog Switch “A” Inputs 0–312, 15, 14, 11—
Analog Switch “A” Common13—
Analog Switch “C” Normally Closed Input——
Analog Switch “C” Normally Open Input——
Analog Switch “C” Common——
Positive Analog and Digital Supply Voltage Input1616V+16
MAX4051/
MAX4051A
MAX4052/
MAX4052A
MAX4053/
MAX4053A
13, 1, 15, 2,
14, 5, 12, 4
MAX4051/A, MAX4052/A, MAX4053/A
66
6
77
88
Note: NO, NC, and COM pins are identical and interchangeable. Any may be considered an input or output; signals pass equally
well in both directions.
TOTAL HARMONIC DISTORTION
100
V± = ±5V
600Ω IN AND OUT
10
1
THD (%)
0.1
0.01
101001k10k
vs. FREQUENCY
FREQUENCY (Hz)
FUNCTION
MAX4051/2/3-10
40
Page 43
Low-Voltage, CMOS Analog
Multiplexers/Switches
Table 1. Truth Table/Switch Programming
ON SWITCHESADDRESS BITS
INH
X = Don’t care * ADDC not present on MAX4052.
Note: NO and COM pins are identical and interchangeable. Either may be considered an input or output; signals pass equally well
in either direction.
ADDC*
X1
00
00
00
00
10
10
10
10
ADDBADDA
XXAll switches openAll switches openAll switches open
00COM–NO0
01COM–NO1
10COM–NO2
11COM–NO3
00COM–NO4
01COM–NO5
10COM–NO6
11COM–NO7
MAX4051/
MAX4051A
MAX4052/
MAX4052A
COMB–NO0B,
COMC–NO0C
COMB–NO1B,
COMC–NO1C
COMB–NO2B,
COMC–NO2C
COMB–NO3B,
COMC–NO3C
COMB–NO0B,
COMC–NO0C
COMB–NO1B,
COMC–NO1C
COMB–NO2B,
COMC–NO2C
COMB–NO3B,
COMC–NO3C
MAX4053/
MAX4053A
COMA–NCA,
COMB–NCB,
COMC–NCC
COMA–NOA,
COMB–NCB,
COMC–NCC
COMA–NCA,
COMB–NOB,
COMC–NCC
COMA–NOA,
COMB–NOB,
COMC–NCC
COMA–NCA,
COMB–NCB,
COMC–NOC
COMA–NOA,
COMB–NCB,
COMC–NOC
COMA–NCA,
COMB–NOB,
COMC–NOC
COMA–NOA,
COMB–NOB,
COMC–NOC
MAX4051/A, MAX4052/A, MAX4053/A
__________Applications Information
Power-Supply Considerations
Overview
The MAX4051/MAX4052/MAX4053 and MAX4051A/
MAX4052A/MAX4053A construction is typical of most
CMOS analog switches. They have three supply pins:
V+, V-, and GND. V+ and V- are used to drive the internal CMOS switches and set the limits of the analog voltage on any switch. Reverse ESD-protection diodes are
internally connected between each analog signal pin
and both V+ and V-. If any analog signal exceeds V+ or
V-, one of these diodes will conduct. During normal
operation, these (and other) reverse-biased ESD diodes
leak, forming the only current drawn from V+ or V-.
41
Virtually all the analog leakage current comes from the
ESD diodes. Although the ESD diodes on a given signal
pin are identical, and therefore fairly well balanced,
they are reverse biased differently. Each is biased by
either V+ or V- and the analog signal. This means their
leakages will vary as the signal varies. The
difference
the two diode leakages to the V+ and V- pins constitutes the analog signal path leakage current. All analog
leakage current flows between each pin and one of the
supply terminals, not to the other switch terminal. This is
why both sides of a given switch can show leakage currents of either the same or opposite polarity.
There is no connection between the analog signal
paths and GND.
in
Page 44
Low-Voltage, CMOS Analog
Multiplexers/Switches
V+ and GND power the internal logic and logic-level
translators, and set both the input and output logic limits. The logic-level translators convert the logic levels
into switched V+ and V- signals to drive the gates of
the analog signals. This drive signal is the only connection between the logic supplies (and signals) and the
analog supplies. V+ and V- have ESD-protection
diodes to GND.
The logic-level thresholds are TTL/CMOS compatible
when V+ is +5V. As V+ rises, the threshold increases
slightly, so when V+ reaches +12V, the threshold is
about 3.1V; above the TTL-guaranteed high-level minimum of 2.8V, but still compatible with CMOS outputs.
COMNO
Bipolar Supplies
These devices operate with bipolar supplies between
±3.0V and ±8V. The V+ and V- supplies need not be
symmetrical, but their sum cannot exceed the absolute
maximum rating of +17V.
EXTERNAL BLOCKING DIODE
Single Supply
These devices operate from a single supply between
+3V and +16V when V- is connected to GND. All of the
bipolar precautions must be observed. At room temperature, they actually “work” with a single supply at near
or below +1.7V, although as supply voltage decreases,
switch on-resistance and switching times become very
high.
Figure 1. Overvoltage Protection Using External Blocking
Diodes
Overvoltage Protection
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maximum ratings, because stresses beyond the listed ratings can cause permanent damage to the devices.
Always sequence V+ on first, then V-, followed by the
logic inputs (NO) and by COM. If power-supply
MAX4051/A, MAX4052/A, MAX4053/A
sequencing is not possible, add two small signal diodes
(D1, D2) in series with the supply pins for overvoltage
protection (Figure 1).
Adding diodes reduces the analog signal range to one
diode drop below V+ and one diode drop above V-, but
does not affect the devices’ low switch resistance and
low leakage characteristics. Device operation is
unchanged, and the difference between V+ and Vshould not exceed 17V. These protection diodes are
not recommended when using a single supply if signal
levels must extend to ground.
In 50Ω systems, signal response is reasonably flat up
to 50MHz (see
Above 20MHz, the on response has several minor
peaks which are highly layout dependent. The problem
is not turning the switch on, but turning it off. The offstate switch acts like a capacitor, and passes higher
frequencies with less attenuation. At 10MHz, off isolation is about -45dB in 50Ω systems, becoming worse
(approximately 20dB per decade) as frequency
increases. Higher circuit impedances also make off isolation worse. Adjacent channel attenuation is about 3dB
above that of a bare IC socket, and is entirely due to
capacitive coupling.
V- = 0V FOR SINGLE-SUPPLY OPERATION.
REPEAT TEST FOR EACH SECTION.
ADD
INH
V+
MAX4053/A
GND
Figure 2. Address Transition Time
V+
V
NO
V-
NC
V+
COM
V-
300Ω
V-
35pF
V
OUT
ADD
0V
V
NC
0V
V
OUT
V
NO
t
TRANS
50%
90%
90%
t
TRANS
43
Page 46
Low-Voltage, CMOS Analog
Multiplexers/Switches
V+
V+
GND
GND
GND
V+
V+
V+
V+
NO0
NO1–NO7
COM
V-
V-
NO0
NO1–NO3
COM
V-
V-
COM
V-
V-
V+
V
OUT
300Ω
300Ω
NO
NC
300Ω
35pF
V+
V
OUT
35pF
V+
V-
V
OUT
35pF
ADDC
ADDB
ADDA
V
INH
50Ω
V
INH
50Ω
MAX4051/A, MAX4052/A, MAX4053/A
V
INH
50Ω
MAX4051/A
INH
ADDC
ADDB
MAX4052/A
INH
ADD
MAX4053/A
INH
V+
V
INH
0V
V
NO0
V
OUT
0V
V+
V
INH
0V
V
NO0
V
OUT
0V
V+
V
INH
0V
V
NO_
V
OUT
0V
50%
t
ON
50%
t
ON
50%
t
ON
90%
90%
90%
90%
90%
90%
t
OFF
t
OFF
t
OFF
V- = 0V FOR SINGLE-SUPPLY OPERATION.
REPEAT TEST FOR EACH SECTION.
Figure 3. Enable Switching Time
44
Page 47
V+
V
ADD
50Ω
V
ADD
50Ω
V- = 0V FOR SINGLE-SUPPLY OPERATION.
REPEAT TEST FOR EACH SECTION.
ADDC
ADDB
ADDA
INH
ADD
INH
V+
MAX4051/A
GND
V+
V+
MAX4053/A
GND
NO0–N07
COM
V-
V-
NO, NC
COM
V-
V-
300Ω
300Ω
Low-Voltage, CMOS Analog
Multiplexers/Switches
MAX4051/A, MAX4052/A, MAX4053/A
V+
V
V+
V
OUT
35pF
V+
V
OUT
35pF
ADD
50Ω
V+
V
ADD
0V
V
NO_
V
OUT
0V
ADDC
ADDB
INH
V+
MAX4052/A
GND
50%
t
OPEN
NO0–NO3
COM
V-
V-
80%
300Ω
t
R
t
F
< 20ns
< 20ns
V+
V
OUT
35pF
Figure 4. Break-Before-Make Interval
V+
V+
CHANNEL
SELECT
ADDC
ADDB
MAX4051/A
ADDA
V
INH
50Ω
MAX4052/A
MAX4053/A
INH
GND
V- = 0V FOR SINGLE-SUPPLY OPERATION.
REPEAT TEST FOR EACH SECTION.
Figure 5. Charge Injection
V+
V
NO
COM
V-
V-
VNO = 0V
V
OUT
CL = 1000pF
INH
0V
V
OUT
∆ V
IS THE MEASURED VOLTAGE DUE TO CHARGE
OUT
TRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ∆ V
X C
OUT
L
∆ V
OUT
45
Page 48
Low-Voltage, CMOS Analog
Multiplexers/Switches
V+
V+
CHANNEL
SELECT
ADDC
ADDB
ADDA
MAX4051/A
MAX4052/A
MAX4053/A
INH
GND
V-
10nF
V-
MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS.
OFF ISOLATION IS MEASURED BETWEEN COM AND "OFF" NO TERMINAL ON EACH SWITCH.
ON LOSS IS MEASURED BETWEEN COM AND "ON" NO TERMINAL ON EACH SWITCH.
CROSSTALK (MAX4052 AND MAX4053) IS MEASURED FROM ONE CHANNEL (A, B, C) TO ALL OTHER CHANNELS.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
Figure 6. Off Isolation, On Loss, and Crosstalk
10nF
COM
V
NO
IN
V
OUT
MEAS.
NETWORK
ANALYZER
50Ω
50Ω 50Ω
50Ω
REF.
OFF ISOLATION = 20log
ON LOSS = 20log
CROSSTALK = 20log
V
OUT
V
IN
V
OUT
V
IN
V
OUT
V
IN
V+
MAX4051/A, MAX4052/A, MAX4053/A
CHANNEL
SELECT
ADDC
ADDB
ADDA
V+
MAX4051/A
NO
NO
MAX4052/A
MAX4053/A
INH
GND
COM
V-
V-
Figure 7. NO/COM Capacitance
46
1MHz
CAPACITANCE
ANALYZER
Page 49
Low-Voltage, CMOS Analog
Multiplexers/Switches
___________________________________________Ordering Information (continued)
PART
MAX4051AEPE
MAX4051AEEE
MAX4051CPE
MAX4051CSE
MAX4051C/D
MAX4051EEE
MAX4052ACPE
MAX4052ACEE
MAX4052AEEE
MAX4052CPE
MAX4052CEE
MAX4052ESE
-40°C to +85°C
-40°C to +85°CMAX4051AESE
-55°C to +125°CMAX4051AMJE
0°C to +70°C
0°C to +70°CMAX4051CEE
-40°C to +85°CMAX4051EPE
-55°C to +125°CMAX4051MJE
0°C to +70°CMAX4052ACSE
-40°C to +85°CMAX4052AEPE
-55°C to +125°CMAX4052AMJE
0°C to +70°CMAX4052CSE
0°C to +70°CMAX4052C/D
-40°C to +85°CMAX4052EEE
PIN-PACKAGETEMP. RANGE
16 Plastic DIP
16 Narrow SO
16 QSOP-40°C to +85°C
16 CERDIP**
16 Plastic DIP0°C to +70°C
16 Narrow SO
16 QSOP
Dice*0°C to +70°C
16 Plastic DIP
16 Narrow SO-40°C to +85°CMAX4051ESE
16 QSOP-40°C to +85°C
16 CERDIP**
16 Plastic DIP0°C to +70°C
16 Narrow SO
16 QSOP0°C to +70°C
16 Plastic DIP
16 Narrow SO-40°C to +85°CMAX4052AESE
16 QSOP-40°C to +85°C
16 CERDIP**
16 Plastic DIP0°C to +70°C
16 Narrow SO
16 QSOP0°C to +70°C
Dice*
16 Plastic DIP-40°C to +85°CMAX4052EPE
16 Narrow SO-40°C to +85°C
16 QSOP
16 CERDIP**-55°C to +125°CMAX4052MJE
PIN-PACKAGETEMP. RANGEPART
MAX4053ACPE
0°C to +70°CMAX4053ACSE
MAX4053ACEE
-40°C to +85°CMAX4053AEPE
MAX4053AEEE
-55°C to +125°CMAX4053AMJE
MAX4053CPE
0°C to +70°CMAX4053CSE
MAX4053CEE
0°C to +70°CMAX4053C/D
MAX4053ESE
-40°C to +85°CMAX4053EEE
16 Plastic DIP0°C to +70°C
16 Narrow SO
16 QSOP0°C to +70°C
16 Plastic DIP
16 Narrow SO-40°C to +85°CMAX4053AESE
16 QSOP-40°C to +85°C
16 CERDIP**
16 Plastic DIP0°C to +70°C
16 Narrow SO
16 QSOP0°C to +70°C
Dice*
16 Plastic DIP-40°C to +85°CMAX4053EPE
16 Narrow SO-40°C to +85°C
16 QSOP
16 CERDIP**-55°C to +125°CMAX4053MJE
* Contact factory for dice specifications.
** Contact factory for availability.
________________________________________________________Package Information
INCHESMILLIMETERS
0°-8°
PKG.
P
P
P
P
P
N
DIM
A
A1
A2
A3
B
B1
C
D1
E
E1
e
eA
eB
L
DIM
PINS
D
D
D
D
D
D
DIM
A
A1
B
C
E
e
H
L
MAX
MIN
–
0.015
0.125
0.055
0.016
0.045
0.008
0.005
0.300
0.240
0.100
0.300
–
0.115
INCHESMILLIMETERS
MIN
8
0.348
14
0.735
16
0.745
18
0.885
20
1.015
24
1.14
INCHESMILLIMETERS
MIN
0.053
0.004
0.014
0.007
0.150
0.228
0.016
0.200
–
0.175
0.080
0.022
0.065
0.012
0.080
0.325
0.310
–
–
0.400
0.150
MAX
0.069
0.010
0.019
0.010
0.157
0.244
0.050
MAX
0.390
0.765
0.765
0.915
1.045
1.265
MIN
0.38
3.18
1.40
0.41
1.14
0.20
0.13
7.62
6.10
2.54
7.62
2.92
18.67
18.92
22.48
25.78
28.96
MIN
1.35
0.10
0.35
0.19
3.80
5.80
0.40
–
–
MIN
8.84
1.270.050
MAX
5.08
–
4.45
2.03
0.56
1.65
0.30
2.03
8.26
7.87
–
–
10.16
3.81
MAX
9.91
19.43
19.43
23.24
26.54
32.13
21-0043A
MAX
1.75
0.25
0.49
0.25
4.00
6.20
1.27
E
D
E1
A3
A2
A
L
A1
e
B1
B
0° - 15°
C
eA
eB
D1
Plastic DIP
PLASTIC
DUAL-IN-LINE
PACKAGE
(0.300 in.)
D
A
0.101mm
e
A1
B
0.004in.
C
L
MAX4051/A, MAX4052/A, MAX4053/A
Narrow SO
HE
SMALL-OUTLINE
PACKAGE
(0.150 in.)
DIM
D
D
D
MIN
MAX
MIN
8
0.189
0.337
0.386
0.197
0.344
0.394
14
16
4.80
8.55
9.80
MAX
5.00
8.75
10.00
21-0041A
INCHESMILLIMETERS
PINS
49
Page 52
Low-Voltage, CMOS Analog
Multiplexers/Switches
_________________________________________Packaging Information (continued)
INCHESMILLIMETERS
DIM
D
A
e
A1
B
S
H
E
A
A1
A2
B
C
D
E
e
H
h
L
N
S
α
MIN
0.061
0.004
0.055
0.008
0.0075
0.150
0.230
0.010
0.016
0°
MAX
MIN
0.068
0.061
0.012
0.157
0.244
0.016
0.035
8°
1.55
0.127
1.40
0.20
0.19
3.81
0.635 BSC0.25 BSC
5.84
0.25
0.41
0°
0.0098
0.0098
SEE VARIATIONS
SEE VARIATIONS
SEE VARIATIONS
MAX
1.73
0.25
1.55
0.31
0.25
3.99
6.20
0.41
0.89
8°
DIM
D
S
D
S
D
S
D
S
h x 45°
N
A2
α
SMALL-OUTLINE
E
C
L
INCHESMILLIMETERS
PINS
MIN
0.189
0.0020
0.337
0.0500
0.337
0.0250
0.386
0.0250
MAX
0.196
0.0070
0.344
0.0550
0.344
0.0300
0.393
0.0300
16
16
20
20
24
24
28
28
QSOP
QUARTER
PACKAGE
MIN
4.80
0.05
8.56
1.27
8.56
0.64
9.80
0.64
MAX
4.98
0.18
8.74
1.40
8.74
0.76
9.98
0.76
21-0055A
MAX4051/A, MAX4052/A, MAX4053/A
50
Page 53
FSDM07652RB
www.fairchildsemi.com
Green Mode Fairchild Power Switch (FPS
Features
• Internal Avalanche Rugged Sense FET
• Advanced Burst-Mode operation consumes under 1 W at
240VA C & 0.5W load
• Precision Fixed Operating Frequency (66kHz)
• Internal Start-up Circuit
• Improved Pulse by Pulse Current Limiting
• Over Voltage Protection (OVP)
• Over Load Protection (OLP)
• Internal Thermal Shutdown Function (TSD)
• Auto-Restart Mode
• Under Voltage Lock Out (UVLO) with hysteresis
• Low Operating Current (2.5mA)
•
Built-in Soft Start
Application
• SMPS for LCD monitor and STB
• Adaptor
Description
The FSDM07652RB is an integrated Pulse Width Modulator
(PWM) and Sense FET specifically designed for high performance offline Switch Mode Power Supplies (SMPS) with
minimal external components. This device is an integrated
high voltage power switching regulator which co mbine an
avalanche rugged Sense FET with a current mode PWM control blo ck. The PWM controller includes integrated fixed frequency oscillator, under voltage lockout, leading edge blanking
(LEB), optimized gate driver, internal soft start, te mperature
compensated precise current sources for a loop compensation
and self protection circuitry. Compared with discrete MOSFET and PWM controller solution, it can reduce total cost,
component count, size and weight simultaneously increasing efficiency, productivity, and system reliability. This d evice i s a
basic platform well suited for cost effective designs of flyback converters.
PRODUCT
FSDM0565RB60W70W50W60W
FSDM07652RB70W80W60W70W
Notes:
1. Typical continuous power in a non-ventilated enclosed
adapter measured at 50°C ambient.
2. Maximum practical continuous power in an open frame
design at 50°C ambient.
3. 230 VAC or 100/115 VAC with doubler.
Typical Circuit
AC
IN
OUTPUT POWER TABLE
230VAC ±15%
Adapt-
(1)
er
Open
Frame
Table 1. Maximum Output Power
Drain
Vstr
PWM
VfbVcc
Figure 1. Typical Flyback Application
Source
TM
(3)
(2)
)
85-265VAC
Adapt-
(1)
er
Open
Frame
DC
OUT
(2)
51
Page 54
FSDM07652RB
Internal Block Diagram
N.C
FB
5
4
0.5/0.7V
I
delay
V
SD
Vcc
Vovp
TSD
+
-
VccVref
Soft start
Vcc
31
8V/12V
I
FB
2.5R
Vcc good
OSC
PWM
R
I
start
Vstr
Vref
SQQ
R
6
Internal
Bias
Gate
driver
Drain
LEB
2
GND
Vcc good
SQQ
R
V
CL
Figure 2. Functional Block Diagram of FSDM07652RB
52
Page 55
Pin Definitions
Pin NumberPin Nam ePin Function Description
1Drain
2GNDThis pin is the control ground and the Sense FET source.
3Vcc
4Vfb
5N.C-
6Vstr
This pin is the high voltage power Sense FET drain. It is designed to drive the
transformer directly.
This pin is the positive supply voltage input. During start up, the power is supplied by an internal high voltage current source that is connected to the Vstr pin.
When Vcc reaches 12V , the internal high voltage current source is disabled and
the power is supplied from the auxiliary transformer winding.
This pin is internally connected to the inverting input of the PWM comparator.
The collector of an opto-coupler is typically tied to this pin. For stable operation,
a capacitor should be placed between this pin and GND. If the voltage of this pin
reaches 6.0V, the over load protection is activated resulting in shutdown of the
TM
FPS
.
This pin is connected directly to the high voltage DC link. At startup, the internal
high voltage current source supplies internal bias and charges the external capacitor that is connected to the Vcc pin. Once Vcc reaches 12V , the internal current source is disabled.
FSDM07652RB
Pin Configuration
TO-220F-6L
6.Vstr
5.N.C.
4.Vfb
3.Vcc
2.GND
1.Drain
Figure 3. Pin Configuration (Top View)
53
Page 56
FSDM07652RB
Absolute Maximum Ratings
(Ta=25°C, unless otherwise specified)
ParameterSymbolValueUnit
Vstr Max VoltageV
Pulsed Drain current (Tc=25
Continuous Drain Current(Tc=25
Continuous Drain Current(Tc=100
Single pulsed avalanche energy
Single pulsed avalanche current
°C)
(1)
°C)
°C)
(2)
(3)
Supply voltageV
Input voltage rangeV
Total power dissipation(Tc=25
°C)
Operating junction temperatureT
Operating ambient temperatureT
Storage temperature rangeT
Notes:
1. Repetitive rating: Pulse width limited by maximum junction temperature
• Gradually increasing current limit
during soft-start further reduces peak
current and voltage component
stresses
• Eliminates external components used
for soft-start in most applications
• Reduces or eliminates output
overshoot
• Improve light load efficiency
• Reduces no-load consumption
57
Page 60
FSDM07652RB
Typical Performance Characteristics
(These Characteristic Graphs are Normalized at Ta= 25°C)
1.2
1.0
0.8
0.6
0.4
Operating Current
(Normalized to 25℃)
0.2
0.0
-50 -250255075100 125
Junction Temperature(℃)
Operating Current vs. Temp
1.2
1.0
0.8
0.6
0.4
(Normalized to 25℃)
0.2
Stop Threshold Voltage
1.2
1.0
0.8
0.6
0.4
(Normalized to 25℃)
0.2
Start Thershold Voltage
0.0
-50 -250255075 100 125
Junction Temperature(℃)
Start Threshold Voltage vs. Temp
1.2
1.0
0.8
0.6
0.4
Initial Frequency
(Normalized to 25℃)
0.2
0.0
-50 -250255075100 125
Junction Temperature(℃)
Stop Threshold Voltage vs. Temp
1.2
1.0
0.8
0.6
0.4
(Normalized to 25℃)
Maximum Duty Cycle
0.2
0.0
-50 -250255075100 125
Junction Temperature(℃)
Maximum Duty vs. Temp
0.0
-50 -250255075 100 125
Ju n c tio n T e mpe r a ture ( ℃)
Operating Freqency vs. Temp
1.2
1.0
0.8
0.6
0.4
FB Source Current
(Normalized to 25℃)
0.2
0.0
-50 -250255075 100 125
Junction Temperature(℃)
Feedback Source Cu rre nt vs. T em p
58
Page 61
FSDM07652RB
Typical Performance Characteristics
(Continued)
(These Characteristic Graphs are Normalized at Ta= 25°C)
1.2
1.0
0.8
0.6
0.4
(Normalized to 25℃)
Shutdown FB Voltage
0.2
0.0
-50 -250255075100 125
Junction Temperature(℃)
ShutDown Feedback Voltage vs. Temp
1.2
1.0
0.8
0.6
0.4
(Normalized to 25℃)
Over Voltage Protection
0.2
0.0
-50 -250255075100 125
Junction Temperature(℃)
1.2
1.0
0.8
0.6
0.4
(Normalized to 25℃)
Shutdown Delay Current
0.2
0.0
-50 -250255075100 125
Junction Temperature(℃)
ShutDown Delay C urrent vs. Temp
1.2
1.0
0.8
0.6
0.4
(Normalized to 25℃)
0.2
Burst Mode Enable Voltage
0.0
-50 -250255075100 125
Junction Temperature(℃)
Over Vo ltage Protection vs. Temp
1.2
1.0
0.8
0.6
0.4
(Normalized to 25℃)
0.2
Burst Mode Disable Voltage
0.0
-50 -250255075 100 125
Junction Temperature(℃)
Burst Mode Disable Voltage vs. Temp
59
Burst Mode Enable Voltage vs. Temp
1.2
1.0
0.8
0.6
0.4
Over Current Limit
(Normalized to 25℃)
0.2
0.0
-50 -250255075100 125
Junction Temperature(℃)
Current Limit vs. Temp
Page 62
FSDM07652RB
Typical Performance Characteristics
(Continued)
(These Characteristic Graphs are Normalized at Ta= 25°C)
1.2
1.0
0.8
0.6
0.4
Soft Start Time
(Normalized to 25℃)
0.2
0.0
-50 -250255075100 125
Junction Temperature(℃)
Soft Start Time vs. Temp
60
Page 63
FSDM07652RB
Functional Description
1.
1. Startup : In previous generations of Fairchild Power
1. 1.
Switches (FPS
resistor to the DC input voltage line. In this generation the
startup resistor is replaced by an internal high voltage current
source. At startup, an internal high voltage current source
supplies the internal bias and charges the external capacitor
(C
) that is connected to the Vcc pin as illustrated in
vcc
Figure 4. When Vcc reaches 12V, the FSDM07652RB
begins switching and t he i nte rn a l high vol ta ge c ur rent source
is disabled. Then, the FSDM07652RB continues its normal
switching operation and the power is supplied from the
auxiliary transformer winding unless Vcc goes below the
stop voltage of 8V.
TM
) the Vcc pin had an external start-up
C
Vcc
V
DC
2.1 Pulse-by-pulse current limit: Because current mode
control is employed, the peak current through the Sense FET
is limited by the inverting inpu t of PWM c omparator (Vfb*)
as shown in Figure 5. Assuming that the 0.9mA current
source flows onl y t h ro ugh the intern al r es i stor ( 2.5R +R= 2.8
kΩ), the cathode voltage of diode D2 is about 2.5V . Since D1
is blocked when the feedback voltage (Vfb) exceeds 2.5V,
the maximum volt a ge of the cat ho de of D2 i s cla m pe d at t his
voltage, thus clamping Vfb*. Therefore, the peak value of
the current through the Sense FET is limited.
2.2 Leading edge blanking (LEB) : At the instant the
internal Sense FET is turned on, there us ually exists a high
current spike through the Sense FET, caused by primary-side
capacitance and secondary-side rectifier reverse recovery.
Excessive voltage across the Rsense resistor would lead to
incorrect feedback operation in the current mode PWM
control. To counter this effect, the FSDM07652RB employs
a leading edge blanking (LEB) circ uit. This circuit inhibits
the PWM comparator for a short time (T
) after the Sense
LEB
FET is turned on.
8V/12V
Vcc
3
I
start
Vcc good
6
Vref
Internal
Bias
Vstr
Figure 4. Internal startup circuit
2. Feedback Control : FSDM07652RB employs current
mode control, as shown in Figure 5. An opto-coupler (such
as the H11A817A) and shunt regulator (such as the KA431)
are typically used to implement the feedback network.
Comparing the feedback voltage with the voltage across the
Rsense resistor plus an offset voltage makes it possible to
control the switching duty cycle. When the reference pin
voltage of the KA431 exceeds the internal reference voltage
of 2.5V, the H11A817A LED current increases, thus pulling
down the feedback voltage and reducing the duty cycle. This
event typically happens when the input voltag e is increased
or the output load is decreased.
VccVref
I
delay
H11A 81 7 A
KA431
Vfb
4
C
B
Vo
V
SD
I
D1D2
V
FB
Gate
driver
SenseFET
R
sense
OSC
2.5R
+
*
fb
R
-
OLP
Figure 5. Pulse width modulation (PWM) circuit
3. Protection Circuit : The FSDM07652R B has sev eral self
protective functions such as over load protection (OLP), over
voltage protection (OVP) and thermal shutdown (TSD).
Because these protection circuits are fully integrated into the
IC without external components, the reliability can be
improved without increasing cost. Once the fault condition
occurs, switching is terminated and the Sense FET remains
off. This causes Vcc to fall. When Vcc reach es the UVLO
stop voltage, 8V, the protection is reset and the internal h igh
voltage current source charges the Vcc capacitor via the Vstr
pin. When Vcc reaches the UVLO start voltage,12V, the
FSDM07652RB resumes its normal operation. In this
manner, the auto-restart can alternately enable and disable
the switching of the power Sense FET until the fault
condition is eliminated (see Figure 6).
61
Page 64
FSDM07652RB
Fault
Vds
Vcc
12V
8V
Power
on
Normal
operation
occurs
Fault
situation
Fault
removed
t
Normal
operation
Figure 6. Auto restart operation
3.1 Over Load Protection (OLP) : Overload is defined as
the load current exceeding a pre-set level due to an
unexpected event. In this situation, the protection circuit
should be activated in order to protect the SMPS. However,
even when the SMPS is in the normal operation, the over
load protection circuit can be activated during the load
transition. In order to avoid this undesired operation, the over
load protection circuit is designed to be activated after a
specified time to determine whether it is a transient situation
or an overload situation. Because of the pulse-by-pulse
current limit capability, the maximum peak current through
the Sense FET is limited, and therefore the maximum input
power is restricted with a given input voltage. If the output
consumes beyond this maximum power, the output voltage
(Vo) decreases below the set voltage. This reduces the
current through the opto-coupler LED, which also reduces
the opto-coupler transistor current, thus increasing the
feedback voltage (Vfb). If Vfb exceeds 2.5V, D1 is blocked
and the 3.5uA current source starts to charge C
slowly up to
B
Vcc. In this condition, Vfb continues increasing until it
reaches 6V, when the switching operation is terminated as
shown in Figure 7. The delay time for shutdown is the time
required to charge C
from 2.5V to 6.0V with 3.5uA. In
B
general, a 10 ~ 50 ms delay time is typical for most
applications.
VVVV
FB
FB
FBFB
Over load protection
Over load protection
Over load protectionOver load protection
6.0V
6.0V
6.0V6.0V
2.5V
2.5V
2.5V2.5V
TTTT
= Cfb*(6.0-2.5)/I
= Cfb*(6.0-2.5)/I
= Cfb*(6.0-2.5)/I= Cfb*(6.0-2.5)/I
12
12
1212
TTTT
1111
delay
delay
delaydelay
tttt
TTTT
2222
Figure 7. Over load protection
3.2 Over voltage Protection (OVP) : If the secondary side
feedback circuit were to malfunction or a solder defect
caused an open in the feedback path, the cu rrent through th e
opto-coupler transistor becomes almost zero. Then, Vfb
climbs up in a similar manner to the over load situation,
forcing the preset maximum current to be supplied to the
SMPS until the over load protection is activated. Because
more energy than required is provided to the output, the
output voltage may exceed the rated voltage before th e over
load protection is activated, resulting in the breakdown of the
devices in the secondary side. In order to prevent this
situation, an over voltage protection (OVP) circuit is
employed. In general, Vcc is proportional to the output
voltage and the FSDM07652RB uses Vcc instead of directly
monitoring the output voltage. If V
exceeds 19V, an OVP
CC
circuit is activated resulting in the termination of the
switching operatio n. In or der to avoid un desir ed activ ati on of
OVP during normal operation, Vcc should be designed to be
below 19V.
3.3 Thermal Shutdown (TSD) : The Sense FET and the
control IC are built in one package. This makes it easy for
the control IC to detect the heat generation from th e Sense
FET. When the temperature exceeds approximately 150°C,
the thermal shutdown is activated.
4. Soft Start : The FSDM07652RB has an internal soft start
circuit that increases PWM comparator inverting input
voltage together with the Sense FET current slowly after it
starts up. The typical soft start time is 10msec, The pulse
width to the power switching device is progressively
increased to establish the correct working conditions for
transformers, inductors, and capacitors. The voltage on the
output capacitors is progressively increased with the
intention of smoothly establishing the required output
voltage. It also helps to prevent transformer saturation and
reduce the stress on the secondary diode during startup.
62
Page 65
5. Burst operation : In order to minimize power dissipation
in standby mode, the FSDM07652RB enters burst mode
operation. As the load decreases, the feedback voltage
decreases. As shown in Figure 8, the device automatically
enters burst mode when the feedback voltage drops below
V
(500mV). At this point switching stops and the
BURL
output voltages start to drop at a rate dependent on standby
current load. This causes the feedback voltage to rise. Once
it passes V
(700mV) switching resumes. The feedback
BURH
voltage then falls and the process repeats. Burst mode
operation alternately enables and disables switching of the
power Sense FET thereby reducing switching loss in
Standby mode.
Vo
set
Vo
V
FB
0.7V
0.5V
FSDM07652RB
Ids
Vds
Switching
disabled
T1
T2 T3
Figure 8. Waveforms of burst operation
Switching
disabled
time
T4
63
Page 66
FSDM07652RB
Typical application circuit
ApplicationOutput powerInput voltageOutput voltage (Max current)
LCD Monitor40W
Universal input
(85-265Vac)
Features
• High efficiency (>81% at 85Vac input)
• Low zero load power consumption (<300mW at 240Vac input)
• Low standby mode power consumption (<800mW at 240Vac input and 0.3W load)
• Low component count
• Enhanced system reliability through various protection functions
• Internal soft- start (10ms)
Key Design Notes
• Resistors R102 and R105 are employed to prevent start-up at low input voltage
• The delay time for over load protection is designed to be about 50ms with C106 of 47nF. If a faster triggering of OLP is
required, C106 can be reduced to 10nF.
1. Schematic
5V (2.0A)
12V (2.5A)
BD101
2KBP06M3N257
1
RT1
5D-9
2
4
C102
220nF
275VAC
LF101
23mH
R101
560kΩΩΩΩ
1W
C101
220nF
275VAC
C103
100uF
400V
3
F1
FUSE
250V
2A
R102
30kΩΩΩΩ
R105
40kΩΩΩΩ
C106
47nF
50V
R103
56kΩΩΩΩ
2W
6
5
4
FSDM 07652RB
Vstr
NC
Vfb
GND
Drain
Vcc
2
C104
10nF
1kV
1
3
ZD101
22V
D101
UF 4007
C105
22uF
50V
D102
TVR10G
R104
5ΩΩΩΩ
D202
T1
MBRF10100
EER3016
C301
4.7nF
IC301
H11A817A
10
C201
1000uF
25V
8
D201
MBRF1045
7
C203
1000uF
10V
6
R201
1kΩΩΩΩ
IC201
KA431
1
2
3
4
5
R202
1.2kΩΩΩΩ
L201
L202
R203
1.2kΩΩΩΩ
C202
1000uF
25V
C204
1000uF
10V
C205
47nF
R204
5.6kΩΩΩΩ
R205
5.6kΩΩΩΩ
12V, 2.5A
5V, 2A
64
Page 67
2. Transformer Schematic Diagram
EER3016
1
N
/2N
p
FSDM07652RB
10
12V
Np/2
N
2
3
4
5
a
9
8
7
N
5V
6
3.Winding Specification
NoPin (s→f)Wir eTurnsWinding Method
Na4 → 50.2
φ
× 18Center Winding
Insulation: Polyester Tape t = 0.050mm, 2Layers
φ
Np/22 → 10.4
× 118Solenoid Winding
Insulation: Polyester Tape t = 0.050mm, 2Layers
N
12V
10 → 80.3
φ
× 37Center Winding
Insulation: Polyester Tape t = 0.050mm, 2Layers
N5V7 → 60.3
φ
× 33Center Winding
Insulation: Polyester Tape t = 0.050mm, 2Layers
φ
Np/23 → 20.4
× 118Solenoid Winding
Outer Insulation: Polyester Tape t = 0.050mm, 2Layers
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREI N TO IMPROVE RELIABI LI TY, FUNCTION OR DESIG N. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POL I CY
FAIRCHILD’S PRODUCTS ARE NOT AUTHOR IZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expec ted to cause the failur e of the life support
device or system, or to affect its safety or effec t iv ene ss .
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
70
Page 73
LP2995
DDR Termination Regulator
LP2995 DDR Termination Regulator
July 2003
General Description
The LP2995 linear regulator is designed to meet the JEDEC
SSTL-2 and SSTL-3 specifications for termination of DDRSDRAM. The device contains a high-speed operational amplifier to provide excellent response to load transients. The
output stage prevents shoot through while delivering 1.5A
continuous current and transient peaks up to 3A in the
application as required for DDR-SDRAM termination. The
LP2995 also incorporates a V
load regulation and a V
chipset and DDR DIMMS.
Patents Pending
REF
pin to provide superior
SENSE
output as a reference for the
Typical Application Circuit
Features
n Low output voltage offset
n Works with +5v, +3.3v and 2.5v rails
n Source and sink current
n Low external component count
n No external resistors required
n Linear topology
n Available in SO-8, PSOP-8 or LLP-16 packages
n Low cost and easy to use
Applications
n DDR Termination Voltage
n SSTL-2
n SSTL-3
71
20039302
Page 74
72
Page 75
11.Terminal for External Connection & Outline Drawing
VREF needs to be decoupled
to both SSTL2_VDD and SSTL2_GND with balanced
decoupling capacitors.
VREF should be routed over a
reference plane and isolated, and possibly
shielded with both SSTL2_VDD and SSTL2_GND
SSTL2_VDD
C57
104
C61
104
SSTL2_VDD
C64
104
C70
104
SSTL2_VDD
C80
C79
104
103
C92
C93
103
104
VREF
VREF2,4
The VTT side of the terminaton resistors should be placed
on a wide VTT island on the surface layer. The island is
located at each end of the bus, so it does not interfere
with the signal routing.